Looking at https://news.ycombinator.com/show , it's definitely no longer a raw feed of show HN: from /new.

It's not clear what the change is, whether it is curation by hand or some other metrics, but it's a positive change, the old Show HN was getting flooded, as recently discussed. ( Although I can't work out how to find that discussion. )

Huge and positive change from the old “Show HN: Another vibe coded filesystem that I won’t even use but it was done with an LLM!”